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binutils-gdb/ld/testsuite/ld-i386/report-reloc-1.d

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ld/x86: Add -z report-relative-reloc Linker generated relative relocations don't have symbol info: [hjl@gnu-cfl-2 tmpdir]$ readelf -rW dump Relocation section '.rela.dyn' at offset 0x180 contains 2 entries: Offset Info Type Sym. Value Symbol's Name + Addend 00002f70 00000008 R_X86_64_RELATIVE 1000 00002f68 00000025 R_X86_64_IRELATIVE 1007 [hjl@gnu-cfl-2 tmpdir]$ Add -z report-relative-reloc to x86 ELF linker to report dynamic relative relocations: [hjl@gnu-cfl-2 tmpdir]$ ../ld-new -pie -melf32_x86_64 -z report-relative-reloc -o dump report-reloc-1.o dump: R_X86_64_IRELATIVE (offset: 0x00002f68, info: 0x00000025, addend: 0x00001007) against 'ifunc' for section '.data.rel.ro.local' in report-reloc-1.o dump: R_X86_64_RELATIVE (offset: 0x00002f70, info: 0x00000008, addend: 0x00001000) against '_start' for section '.data.rel.ro.local' in report-reloc-1.o [hjl@gnu-cfl-2 tmpdir]$ It can be used to map relative relocations to corresponding symbols. bfd/ * elf-linker-x86.h (elf_linker_x86_params): Add report_relative_reloc. * elf32-i386.c (elf_i386_relocate_section): Call _bfd_x86_elf_link_report_relative_reloc to report relative relocations for -z report-relative-reloc. (elf_i386_finish_dynamic_symbol): Likewse. * elf64-x86-64.c (elf_x86_64_relocate_section): Likewse. (elf_x86_64_finish_dynamic_symbol): Likewse. * elfxx-x86.c (_bfd_x86_elf_link_report_relative_reloc): New function. * elfxx-x86.h (_bfd_x86_elf_link_report_relative_reloc): New prototype. ld/ * NEWS: Mention -z report-relative-reloc. * ld.texi: Document -z report-relative-reloc. * emulparams/elf32_x86_64.sh: Source x86-report-relative.sh. * emulparams/elf_i386.sh: Likewse. * emulparams/elf_x86_64.sh: Likewse. * emulparams/x86-report-relative.sh: New file. * testsuite/ld-i386/report-reloc-1.d: Likewse. * testsuite/ld-i386/report-reloc-1.l: Likewse. * testsuite/ld-i386/report-reloc-1.s: Likewse. * testsuite/ld-x86-64/report-reloc-1-x32.d: Likewse. * testsuite/ld-x86-64/report-reloc-1.d: Likewse. * testsuite/ld-x86-64/report-reloc-1.l: Likewse. * testsuite/ld-x86-64/report-reloc-1.s: Likewse. * testsuite/ld-i386/i386.exp: Run report-reloc-1. * testsuite/ld-x86-64/x86-64.exp: Run report-reloc-1 and report-reloc-1-x32.
2021-01-16 10:06:48 +08:00
#source: report-reloc-1.s
#as: --32
elf: Support DT_RELR in linker tests Allow eabling and disabling DT_RELR in linker tests. Disable DT_RELR in linker tests which don't expect DT_RELR in linker outputs. binutils/ * testsuite/lib/binutils-common.exp (run_dump_test): Make DT_RELR_LDFLAGS and NO_DT_RELR_LDFLAGS global. ld/ * testsuite/config/default.exp (DT_RELR_LDFLAGS): New. (DT_RELR_CC_LDFLAGS): Likewise. (NO_DT_RELR_LDFLAGS): Likewise. (NO_DT_RELR_CC_LDFLAGS): Likewise. * testsuite/ld-elf/shared.exp: Pass $NO_DT_RELR_LDFLAGS to linker for some tests. * testsuite/ld-i386/export-class.exp: Likewise. * testsuite/ld-i386/i386.exp: Likewise. * testsuite/ld-i386/ibt-plt-2a.d: Pass $NO_DT_RELR_LDFLAGS to linker. * testsuite/ld-i386/ibt-plt-3a.d: Likewise. * testsuite/ld-i386/ibt-plt-3c.d: Likewise. * testsuite/ld-i386/pr26869.d: Likewise. * testsuite/ld-i386/report-reloc-1.d: Likewise. * testsuite/ld-ifunc/ifunc-2-i386-now.d: Likewise. * testsuite/ld-ifunc/ifunc-2-local-i386-now.d: Likewise. * testsuite/ld-ifunc/ifunc-2-local-x86-64-now.d: Likewise. * testsuite/ld-ifunc/ifunc-2-x86-64-now.d: Likewise. * testsuite/ld-ifunc/pr17154-x86-64.d: Likewise. * testsuite/ld-x86-64/bnd-branch-1-now.d: Likewise. * testsuite/ld-x86-64/bnd-ifunc-1-now.d: Likewise. * testsuite/ld-x86-64/bnd-ifunc-2-now.d: Likewise. * testsuite/ld-x86-64/bnd-ifunc-2.d: Likewise. * testsuite/ld-x86-64/bnd-plt-1-now.d: Likewise. * testsuite/ld-x86-64/bnd-plt-1.d: Likewise. * testsuite/ld-x86-64/ibt-plt-2a-x32.d: Likewise. * testsuite/ld-x86-64/ibt-plt-2a.d: Likewise. * testsuite/ld-x86-64/ibt-plt-3a-x32.d: Likewise. * testsuite/ld-x86-64/ibt-plt-3a.d: Likewise. * testsuite/ld-x86-64/ilp32-4.d: Likewise. * testsuite/ld-x86-64/load1c.d: Likewise. * testsuite/ld-x86-64/load1d.d: Likewise. * testsuite/ld-x86-64/pr13082-2b.d: Likewise. * testsuite/ld-x86-64/pr14207.d: Likewise. * testsuite/ld-x86-64/pr18176.d: Likewise. * testsuite/ld-x86-64/pr19162.d: Likewise. * testsuite/ld-x86-64/pr19636-2d.d: Likewise. * testsuite/ld-x86-64/pr19636-2l.d: Likewise. * testsuite/ld-x86-64/pr20253-1d.d: Likewise. * testsuite/ld-x86-64/pr20253-1f.d: Likewise. * testsuite/ld-x86-64/pr20253-1j.d: Likewise. * testsuite/ld-x86-64/pr20253-1l.d: Likewise. * testsuite/ld-x86-64/report-reloc-1-x32.d: Likewise. * testsuite/ld-x86-64/report-reloc-1.d: Likewise. * testsuite/ld-x86-64/export-class.exp (x86_64_export_class_test): Pass $NO_DT_RELR_LDFLAGS to linker. * testsuite/ld-x86-64/x86-64.exp: Pass $NO_DT_RELR_LDFLAGS to linker for some tests.
2022-01-05 23:12:03 +08:00
#ld: -pie -melf_i386 -z report-relative-reloc $NO_DT_RELR_LDFLAGS
ld/x86: Add -z report-relative-reloc Linker generated relative relocations don't have symbol info: [hjl@gnu-cfl-2 tmpdir]$ readelf -rW dump Relocation section '.rela.dyn' at offset 0x180 contains 2 entries: Offset Info Type Sym. Value Symbol's Name + Addend 00002f70 00000008 R_X86_64_RELATIVE 1000 00002f68 00000025 R_X86_64_IRELATIVE 1007 [hjl@gnu-cfl-2 tmpdir]$ Add -z report-relative-reloc to x86 ELF linker to report dynamic relative relocations: [hjl@gnu-cfl-2 tmpdir]$ ../ld-new -pie -melf32_x86_64 -z report-relative-reloc -o dump report-reloc-1.o dump: R_X86_64_IRELATIVE (offset: 0x00002f68, info: 0x00000025, addend: 0x00001007) against 'ifunc' for section '.data.rel.ro.local' in report-reloc-1.o dump: R_X86_64_RELATIVE (offset: 0x00002f70, info: 0x00000008, addend: 0x00001000) against '_start' for section '.data.rel.ro.local' in report-reloc-1.o [hjl@gnu-cfl-2 tmpdir]$ It can be used to map relative relocations to corresponding symbols. bfd/ * elf-linker-x86.h (elf_linker_x86_params): Add report_relative_reloc. * elf32-i386.c (elf_i386_relocate_section): Call _bfd_x86_elf_link_report_relative_reloc to report relative relocations for -z report-relative-reloc. (elf_i386_finish_dynamic_symbol): Likewse. * elf64-x86-64.c (elf_x86_64_relocate_section): Likewse. (elf_x86_64_finish_dynamic_symbol): Likewse. * elfxx-x86.c (_bfd_x86_elf_link_report_relative_reloc): New function. * elfxx-x86.h (_bfd_x86_elf_link_report_relative_reloc): New prototype. ld/ * NEWS: Mention -z report-relative-reloc. * ld.texi: Document -z report-relative-reloc. * emulparams/elf32_x86_64.sh: Source x86-report-relative.sh. * emulparams/elf_i386.sh: Likewse. * emulparams/elf_x86_64.sh: Likewse. * emulparams/x86-report-relative.sh: New file. * testsuite/ld-i386/report-reloc-1.d: Likewse. * testsuite/ld-i386/report-reloc-1.l: Likewse. * testsuite/ld-i386/report-reloc-1.s: Likewse. * testsuite/ld-x86-64/report-reloc-1-x32.d: Likewse. * testsuite/ld-x86-64/report-reloc-1.d: Likewse. * testsuite/ld-x86-64/report-reloc-1.l: Likewse. * testsuite/ld-x86-64/report-reloc-1.s: Likewse. * testsuite/ld-i386/i386.exp: Run report-reloc-1. * testsuite/ld-x86-64/x86-64.exp: Run report-reloc-1 and report-reloc-1-x32.
2021-01-16 10:06:48 +08:00
#warning_output: report-reloc-1.l
#readelf: -r --wide
Relocation section '.rel.dyn' at offset 0x[0-9a-f]+ contains 2 entries:
+Offset +Info +Type +Sym.* Value +Symbol's Name
[0-9a-f]+ +[0-9a-f]+ +R_386_RELATIVE +
[0-9a-f]+ +[0-9a-f]+ +R_386_IRELATIVE +
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